Pencil sharpener



c. A. BIIRDICK.

PENCIL SHARPENER'.

APPLICATION FILED IIIAII; 22, 1920.

A 30 lll! a/ @will l//l/ Afmrdifk Uur-ren res CHARLES A. BunDroK, or rrnnosne, WISCONSIN.-

'rear PENCIL srrnnrnnnn.

Application tiled March 22, i920. VSerial No. 4367,336.

To all whom t mja-g] concern.'

Be it known that I, CHARLES A. BURDICK, a citizen o'f the United States, and resident of Kenosha, in the county "of Kenosha and State of VVis'c'onsi'n, have invented certain new and useful Improvements in Pencil Sharpeners; and I do hereby 'declare th at the Yfollowing is full, clear, and exact deseripti'on thereof.

My invention relates to new and useful improvements in pencil Sharpeners and is vadapted tovparticularly 'provide for adjustmeans for the cutting elements thereof. vln those pen'cill sli'arpeners at present in general use which have `revoluble cutting rolls `vmounted in a rotatable frame, it is impossible to adjust the cutting elements to- Ward 'or away from each other to either vary the character 'of the point made on a pencil, 'or to provide 'a take-up for adjusting 'these parts after they have' been yreground lor resharpened. In other Words if the diameter of the cutting rolls is changed lwhen the same are 're` `rou`1`1d7 they Will in all probability cut a'n imperfect point on 'pencil inasmuch jas they are spaced more than n normal distance apart.,

'Consequently it is 'the primary object of this intention t'o provide means in connection `with a pencil Sharpener having rotary cutting rolls whereby 'the cutting Afaces there- 'of 'may be' adjusted toward or aivay from each other. y i

It is also 'an object of this invention to provide means in connection vwith the other .features foi1 adj'ustinn the cutting rolls with respect to the longitudinal center line or axis of the Sharpener. j

VAn additional object lis to provide a simply constructed pencil sharpener which can be readily adjusted and operated and Will be extremely eiiicient in operation.

With these general objects in view the invention consists in the novel features of construction, combination and arrangement of parts which will be hereinafter more particularly described and claimed.

In the accompanying` drawing;

Figure 1 represents a longitudinal sectional vieW through the operating' parts of a pencil Sharpener constructed in accordance With the invention, the cutting rolls thereof being diagrammatically represented by means of dot and dash lines.

Figure 2 is a transverse sectional view -iie'd adjusting means.

'ivith the brace bars 11.

showing the head which forms one partof the rotar f cutting roll supporting frame in elevation.

Figurek 3 is a transverse sectional vieur taken on the plane of the line 3-43 'of Figure L1 and illustrating an adjusting means somewhat dierent from that shown in Fig. 1 and Figure 4 is a detail loi'igitu'dinal sectional view on the plane 'of the line 4 4 ofFigur'e 3 andshoiving a second vieiv of the modi- Referring-to Figures 1 and 2 of the drawing, it Will be seen that the device 'embodying my improved features of construction 'is supported as is 'customary in sharpenersfof this character upon a standard or other support 1, which carries a bearing casing 2, rone portion thereof-being extended as at 3 to forma bearing sleeve for 'a rotating spindle 4. in the other or main portion 'of the bearing casing` 2 is 'revolubly mounted a rotary head 5 With which the spindle Ll. is connected and which forms one end of a cutting roll. supporting frame 6. The outer end of the spindle 41- Which projects b'eyoi'id the bearing sleeve 3 has a crank handle Z connected thereto 'whereby the frame 6 may be rotated. This frame is located ina housing 8 which is carried iii) mainly by la radial flange 9 extend-ing from j the bearing casing 2.

The frame (i in addition to the head 5 -includes a pencil receiving sleeve 10, 'a pair of spaced brace bars 11 connecting` 'the he'ad 'and sleeve. and a pair of diametric'ally opposed radially extending arms 1f2- tvhi'ch project .from the sleeve 10 adjacent its connection The lllfi VO fle end of the sleeve 10 is journalled in one end Wall of the housing 8 and opens therethrough to receive a pencil.

The portion of the head 5 betvveen the brace bars 11 is provided with a central stop rib 13 which is disposed transversely of the 100 axis of the frame G and spindle 4, on the center line thereof. but is aligned therewith. Furthermore this stop rib 13 is located in a plane at right angles to the plane of the radiallv extending arms 12. The brace bars 105 11 adjacent their connection With the head 5 are provided with sight openings 14 which are aligned with the stop rib 13 as clearly shown in Figure 2.

Each of the arms 12 is designed to sup- 110 port one end of a relatively iiXed shaft 15, the opposite end of which is reduced to form a pin 16 which is extended through a slot 17 in the head 5 and into a transverse bore 18 therein. The portions of the shaft 15 which engage the arms 12 are screw threaded and loosely disposed in screw threaded holes in the latter. In other words the connection between the arms 12 and shafts 15 is such as to hold the latter against longitudinal shifting except when rotated, while at the same time permitting the axes of said shafts to be moved toward or away from each other.

By such an arrangement the shafts may be adjusted with respect to each other, and the center line of the frame 6 by shifting the pins 16 in the proper direction. This is accomplished by means of adjusting screws 19 which are threaded in the bore 18 of the head 5. One of these adjusting screws is provided for each of the pins 16, and each has an annular groove 20 receiving its pin. Thus either one or both shafts may be shifted at will.

It will be noticed from Figure 1 that the axes 0f the shafts 15 are converged with respect to each other and toward the yhead 5 so that the pencil engaging faces of the cutting rolls R are positioned at an angle with respect to each other, this angle being similar to that to be formed on a pencil which has been sharpened by the cutting rolls. Inasmuch as the pencil to be sharpened is inserted in the frame 6 longitudinally thereof, it is desirable that the cutting faces of the rolls be disposed equal distances from the center line or axis of the frame 6 and spindle 4. If the rolls are not properly positioned, they can be independently adjusted by means of the adjusting screws 19, the movement thereof toward or away from each other being observable through the sight openings 14. Accurate adjustment is thus readily procured. After the rolls have been properly positioned, they and the frame 6 may be revolved by turning the crank handle 7. Owing to the fact that the rolls are gear connected as at 21 with the relatively stationary bearing casing 2, they'will be revolved on their shafts 15 as well as with the frame 6.

ln Figures 3 and 4 a slightly modified form of the invention is illustrated, the difference between it and the first described type being in the manner of shifting the ends of the shafts which support the cutting rolls, these shafts in Figure 4 being indicated b y the reference character 25, having tapered ends 26 for engagement in tapered sockets 2T-of a rotary head 28. The outer portions of the sockets 27 are V-shaped as at 29 so that the tapered ends 26 of the shafts 25 may be effectively clamped therein. Movement of the shafts ends toward or away from each other is obtained by means of adjusting screws 30 which are threaded into bores 31 formed in the head. rFliese adjusting screws have conical heads 32 for engagement with the tapered ends 26 of the shafts 25. The parts associated with the elements shown in Figures 3 and 4 are the same as in the structure depicted in Figure 1, the head 28 being adapted to be journalled in a bearing casing similar to the casing 2 and to be rotated similarly to the head 5.

Various changes may be made in the dif ferent parts of the invention as well as in the manner of associating the same together, without departing from the principles as outlined in following claim.

l claim:

A device of the character describedcomprising a rotary frame, a pair of rotary cuttin members carried by the frame and having their shafts converging toward the axis of the frame, a pair of adjusting screws threaded into the frame transversely to the axis thereof and in the same plane with the consin.

CHARLES A. BURDYICK. 

